Post-Anesthesia Care — MCQs

10 questions

The Children's Hospital of Eastern Ontario Pain Scale (CHEOPS) for rating postoperative pain in children under one year excludes all of the following, EXCEPT:

A postoperative patient with pH 7.25, MAP (mean arterial pressure) 60 mm Hg is treated with?

All of the following are complications of epidural anaesthesia, EXCEPT:

Most sensitive method of monitoring cardiovascular ischemia in the perioperative period is -

Shivering observed in the early part of the postoperative period is due to

In the TRIAGE system for disaster management, which of the following color codes denotes "high-priority treatment and/or transfer"?

All are management of PDPH except-

Awareness during anaesthesia can be assessed by:

Which of the following agents is used for the treatment of post operative shivering?

Q10

What type of respiratory failure is most commonly observed in post-operative patients?

Post-Anesthesia Care Indian Medical PG Practice Questions and MCQs

Question 1: The Children's Hospital of Eastern Ontario Pain Scale (CHEOPS) for rating postoperative pain in children under one year excludes all of the following, EXCEPT:

A. Oxygen saturation
B. Torso
C. Verbal response (Correct Answer)
D. Cry

Explanation: ***Verbal response*** - The Children's Hospital of Eastern Ontario Pain Scale (CHEOPS) is designed for children **under one year of age**, who are typically pre-verbal. - While verbal complaints are not assessed, a child's **verbal response** (e.g., moaning, crying, or not making sounds at all) in relation to pain is a component of the scale, contributing to the interpretation of their comfort level. *Oxygen saturation* - **Physiological parameters** like oxygen saturation are typically not part of behavioral pain scales like CHEOPS, which focus on observable behaviors. - While low oxygen saturation can indicate distress, it is not a direct measure of pain for this scale. *Torso* - The CHEOPS scale assesses **pain-related behaviors** of extremities (e.g., legs, arms) and facial expressions, but does not specifically include observations of the "torso" as a separate category. - Behaviors like stiffening or arching of the torso might be implicitly considered under overall body tension, but it’s not a distinct domain. *Cry* - The **quality and intensity of crying** is a primary behavioral indicator of pain in pre-verbal infants and is a significant component of many pediatric pain scales, including CHEOPS. - A child's cry, along with other behaviors, helps differentiate between various levels of discomfort or pain.

Question 2: A postoperative patient with pH 7.25, MAP (mean arterial pressure) 60 mm Hg is treated with?

A. Only normal saline
B. fluid restriction
C. Fluid therapy with CVP monitoring (Correct Answer)
D. I.V. sodium bicarbonate

Explanation: ***Fluid therapy with CVP monitoring*** - The patient's **MAP of 60 mmHg** indicates **hypotension** and potential **hypovolemic shock**, while pH 7.25 suggests **acidosis**, which could be metabolic due to poor perfusion. Initial treatment should focus on **restoring circulating volume** to improve blood pressure and organ perfusion. - **Central venous pressure (CVP) monitoring** is crucial to guide fluid resuscitation. It helps assess the patient's fluid status and ensures that enough fluid is given to improve cardiac output without causing fluid overload, especially in a severely ill patient. *Only normal saline* - While normal saline is used for fluid resuscitation, simply stating "only normal saline" is insufficient because it doesn't address the **critical need for monitoring** to guide treatment. - The amount and rate of fluid administration need to be carefully controlled based on the patient's response and hemodynamic parameters. *Fluid restriction* - **Fluid restriction** would be contraindicated in this patient because the **low MAP** suggests **hypovolemia or cardiogenic shock**, requiring fluid repletion, not restriction. - Restricting fluids could further worsen hypotension and organ hypoperfusion, leading to increased acidosis and organ damage. *I.V. sodium bicarbonate* - Administering **I.V. sodium bicarbonate** to correct acidosis without addressing the underlying cause of hypotension and poor perfusion is generally not recommended. - The acidosis (pH 7.25) is likely due to **poor tissue oxygenation and lactic acid production** from inadequate blood flow; correcting this with fluids will resolve the acidosis.

Question 3: All of the following are complications of epidural anaesthesia, EXCEPT:

A. Urinary retention
B. Total spinal analgesia
C. Hypopnoea
D. Hypertension (Correct Answer)

Explanation: ***Hypertension*** - Epidural anesthesia commonly causes **vasodilation** and a subsequent drop in **blood pressure** (hypotension), not hypertension, due to sympathetic blockade. - While hypertension can occur due to pain or anxiety during the procedure, it is not a direct physiological complication of the epidural anesthetic itself. *Urinary retention* - Epidural anesthesia can affect the nerves controlling the **bladder**, leading to temporary **urinary retention**. - This is a common complication, often requiring catheterization until the epidural wears off. *Total spinal analgesia* - This occurs if the epidural needle inadvertently punctures the **dura** and a large dose of local anesthetic is injected into the **subarachnoid space**. - It results in widespread **sensory and motor blockade**, potentially leading to respiratory arrest and hemodynamic collapse. *Hypopnoea* - High epidural blocks or accidental **intrathecal administration** can cause paralysis of **intercostal muscles** and the diaphragm. - This can lead to **respiratory depression** (hypopnoea) or even apnea, necessitating ventilatory support.

Question 4: Most sensitive method of monitoring cardiovascular ischemia in the perioperative period is -

A. NIBP
B. ECG
C. Pulse oximeter
D. TEE (Correct Answer)

Explanation: ***TEE*** - **Transesophageal echocardiography (TEE)** is the most sensitive method for detecting perioperative myocardial ischemia because it can visualize **regional wall motion abnormalities** and changes in **ventricular function** much earlier than ECG. - **Ischemia** directly impairs the contractility of the affected myocardium, leading to subtle changes in wall motion that TEE can identify. *NIBP* - **Non-invasive blood pressure (NIBP)** monitoring can detect **hemodynamic changes** (like hypotension or hypertension) that may precede or accompany ischemia. - However, these changes are **non-specific** and occur relatively late, making NIBP a less sensitive indicator of early ischemia. *ECG* - **Electrocardiography (ECG)** monitors the electrical activity of the heart and can detect **ST-segment changes** indicative of ischemia. - While useful, ECG changes may appear later than wall motion abnormalities, and **silent ischemia** can be missed if the leads are not optimally placed or if the ischemia does not produce significant electrical changes. *Pulse oximeter* - A **pulse oximeter** measures **oxygen saturation** in the peripheral blood. - It is primarily used to assess **respiratory function** and tissue oxygenation, and it does not directly monitor myocardial ischemia or cardiac function.

Question 5: Shivering observed in the early part of the postoperative period is due to

A. Hypothermia (Correct Answer)
B. Pain
C. Emergence delirium
D. Drug withdrawal

Explanation: **Hypothermia** - Shivering is a primary physiological response to **hypothermia**, an attempt by the body to generate **heat** by increasing muscle activity. - Patients often experience a drop in core body temperature during surgery due to factors like cold operating rooms, exposed body cavities, and anesthetic effects. *Pain* - While pain can cause discomfort and muscle tension, it typically does not manifest as generalized **shivering** in the early postoperative period. - Pain is usually managed with analgesics, and shivering is more indicative of a **thermoregulatory disturbance**. *Emergence delirium* - Emergence delirium is characterized by disorientation, agitation, and non-purposeful movements, but not primarily by **shivering**. - This condition is often related to the residual effects of anesthetic agents or anxiety upon waking. *Drug withdrawal* - Drug withdrawal can cause tremors and agitation, but it is less likely to present as **shivering** in the immediate postoperative period in a patient without a known history of substance dependence. - Withdrawal symptoms typically manifest hours to days after the cessation of the drug, depending on its half-life.

Question 6: In the TRIAGE system for disaster management, which of the following color codes denotes "high-priority treatment and/or transfer"?

A. Red (Correct Answer)
B. Black
C. Yellow
D. Green

Explanation: ***Red*** - The **red tag** in the TRIAGE system signifies critical injuries requiring **immediate intervention** and transport to save life or limb. - Patients tagged red have a high priority for treatment with a good chance of survival if attended to promptly. - This represents the **highest priority** category for "high-priority treatment and/or transfer." *Green* - The **green tag** indicates patients with **minor injuries** who can walk and care for themselves. - Also known as the "**walking wounded**," these patients require minimal or delayed medical attention. - They have the **lowest priority** in disaster triage and can wait hours for treatment. *Black* - A **black tag** indicates the patient is **deceased** or has injuries so severe that survival is unlikely given the available resources. - These patients are assigned a low priority for treatment to allocate resources to those with a better prognosis. - Also called "**expectant**" in some systems. *Yellow* - The **yellow tag** designates patients with **serious, but non-life-threatening injuries** who can wait for treatment for a few hours. - These patients are stable enough that they do not require immediate intervention but will need medical attention. - Examples include fractures, moderate burns, or stable abdominal injuries.

Question 7: All are management of PDPH except-

A. Stool softeners (Correct Answer)
B. Analgesic + caffeine
C. Intravenous / oral fluids
D. Upright position

Explanation: ***Stool softeners*** - While **stool softeners** may be prescribed to prevent **straining** in patients experiencing PDPH, they do not directly treat the underlying cause or symptoms of PDPH. - The primary goal of PDPH management is to re-establish **CSF pressure** and relieve headache, which stool softeners do not achieve. *Analgesic + caffeine* - **Caffeine** is a common component of PDPH management as it causes **cerebral vasoconstriction**, which can help alleviate the headache. - **Analgesics** (e.g., NSAIDs, opioids) are used to manage the pain associated with PDPH. *Intravenous / oral fluids* - Increasing **fluid intake**, both oral and intravenous, helps to promote **CSF production** and potentially increase intracranial pressure, thereby alleviating PDPH symptoms. - This is a supportive measure for rehydration and to potentially restore **CSF volume**. *Upright position* - An **upright position** typically **worsens** PDPH symptoms because it increases the gravitational pull on the CSF, further lowering intracranial pressure. - Patients with PDPH are usually advised to maintain a **supine (flat)** position to minimize headache severity.

Question 8: Awareness during anaesthesia can be assessed by:

A. ARTERIAL B.P
B. ETCO2
C. BIS (Correct Answer)
D. NEUROMUSCULAR MONITOR

Explanation: ***

Question 9: Which of the following agents is used for the treatment of post operative shivering?

A. Atropine
B. Thiopentone
C. Pethidine (Correct Answer)
D. Suxamethonium

Explanation: ***Pethidine*** - **Pethidine (meperidine)** is a **synthetic opioid** known for its **mu-receptor agonism** and weak anticholinergic properties, making it effective in treating **post-operative shivering**. - Its mechanism in reducing shivering is thought to involve modulation of the **thermoregulatory center** in the hypothalamus. *Atropine* - **Atropine** is an **anticholinergic drug** that primarily blocks muscarinic acetylcholine receptors, leading to effects like increased heart rate and decreased secretions. - It does not directly act on the thermoregulatory centers or muscle activity responsible for shivering. *Thiopentone* - **Thiopentone** is a **barbiturate** used as an intravenous anesthetic, primarily for induction of anesthesia. - While it has CNS depressant effects, it is not indicated or effective for the specific treatment of post-operative shivering. *Suxamethonium* - **Suxamethonium (succinylcholine)** is a **depolarizing neuromuscular blocker** used to induce muscle paralysis, typically for intubation. - It would prevent shivering by paralyzing skeletal muscles, but this is a dangerous and inappropriate treatment for shivering due to its profound respiratory depressant effects.

Question 10: What type of respiratory failure is most commonly observed in post-operative patients?

A. Hypercapnic respiratory failure
B. Mixed respiratory failure
C. Perioperative respiratory failure
D. Hypoxemic respiratory failure (Correct Answer)

Explanation: ***Hypoxemic respiratory failure*** - **Hypoxemic respiratory failure** (Type I) is characterized by a **PaO2 less than 60 mmHg** with a normal or low PaCO2, often due to **V/Q mismatch** and **shunt**. - Post-operative patients frequently develop **atelectasis**, **pneumonia**, or **pulmonary edema**, leading to impaired gas exchange and reduced oxygenation. - This is the **most commonly observed type** in the immediate post-operative period. *Hypercapnic respiratory failure* - **Hypercapnic respiratory failure** (Type II) is primarily due to **alveolar hypoventilation**, resulting in a **PaCO2 greater than 50 mmHg**. - While it can occur post-operatively, it is less common than hypoxemic failure and is typically seen with significant **sedation**, **neuromuscular blockade**, or severe **obstructive lung disease**. *Mixed respiratory failure* - **Mixed respiratory failure** involves both **hypoxemia** and **hypercapnia**, indicating severe impairment in both oxygenation and ventilation. - Although it can occur in severe post-operative complications, it is not the *most commonly observed initial presentation* compared to isolated hypoxemia. *Perioperative respiratory failure* - **Perioperative respiratory failure** (Type III) occurs specifically in the surgical setting and involves atelectasis from changes in chest wall mechanics. - While this occurs in the post-operative context, the term is less commonly used, and the **underlying mechanism is primarily hypoxemic** in nature.

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